Investigation of physical and mechanical properties of (BaSnO3)x(Bi,Pb)-2223 composite

Frontiers in Theoretical and Applied Physics/UAE 2017

Habanjar, K.^1 ; Barakat, M.M.E.^2 ; Awad, R.^1

Physics Department, Faculty of Science, Beirut Arab University, Beirut, Lebanon^1

Physics Department, Faculty of Science, Alexandria University, Alexandria, Egypt^2

关键词: Coprecipitation method;    Electrical resistances;    Electrical resistivity measurements;    Indentation size effects;    Physical and mechanical properties;    Proportional specimen resistances;    Solid-state reaction techniques;    Structural and mechanical properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/869/1/012030/pdf
DOI  :  10.1088/1742-6596/869/1/012030

来源: IOP

【 摘 要 】

The effect of BaSnO3nanoparticles addition on the structural and mechanical properties of (Bi,Pb)-2223 superconducting phase by means of X-rays diffraction analysis (XRD), scanning electron microscope (SEM), electrical resistance and Vickers microhardness measurement was studied. BaSnO3nanomaterial and (BaSnO3)x(Bi,Pb)-2223 superconducting samples were prepared using co-precipitation method and standard solid-state reaction techniques, respectively. From XRD data, the addition of BaSnO3into (Bi,Pb)-2223 phase does not affect the tetragonal structure and the lattice parameters. SEM images indicate that the microstructure of (Bi,Pb)-2223 was enhanced by adding BaSnO3nanoparticles by filling its pores and voids. The superconducting transition temperature Tc aswell as the critical transport current density Jc, estimated from electrical resistivity measurements, are increased up to x = 0.5 wt%, then decreased with further increase in x. Vickers microhardness measurements Hvwere carried out at room temperature as a function of applied. The experimental Hvresults were analysed in view of Meyer's law, Hays and Kendall (HK) approach, elastic/plastic deformation (EPD) and proportional specimen resistance (PSR). All samples exhibit normal indentation size effect (ISE), in addition to that, the analysis shows that the Hays and Kendall model is the most suitable one to describe the load independent microhardness for (BaSnO3)x(Bi,Pb)-2223 superconducting samples.